You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
119 lines
3.6 KiB
119 lines
3.6 KiB
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const RuntimeGlobals = require("../RuntimeGlobals");
|
|
const RuntimeModule = require("../RuntimeModule");
|
|
const Template = require("../Template");
|
|
|
|
/** @typedef {import("../Chunk")} Chunk */
|
|
/** @typedef {import("../Compilation")} Compilation */
|
|
|
|
/**
|
|
* @typedef {object} AsyncWasmLoadingRuntimeModuleOptions
|
|
* @property {function(string): string} generateLoadBinaryCode
|
|
* @property {boolean} supportsStreaming
|
|
*/
|
|
|
|
class AsyncWasmLoadingRuntimeModule extends RuntimeModule {
|
|
/**
|
|
* @param {AsyncWasmLoadingRuntimeModuleOptions} options options
|
|
*/
|
|
constructor({ generateLoadBinaryCode, supportsStreaming }) {
|
|
super("wasm loading", RuntimeModule.STAGE_NORMAL);
|
|
this.generateLoadBinaryCode = generateLoadBinaryCode;
|
|
this.supportsStreaming = supportsStreaming;
|
|
}
|
|
|
|
/**
|
|
* @returns {string | null} runtime code
|
|
*/
|
|
generate() {
|
|
const compilation = /** @type {Compilation} */ (this.compilation);
|
|
const chunk = /** @type {Chunk} */ (this.chunk);
|
|
const { outputOptions, runtimeTemplate } = compilation;
|
|
const fn = RuntimeGlobals.instantiateWasm;
|
|
const wasmModuleSrcPath = compilation.getPath(
|
|
JSON.stringify(outputOptions.webassemblyModuleFilename),
|
|
{
|
|
hash: `" + ${RuntimeGlobals.getFullHash}() + "`,
|
|
hashWithLength: length =>
|
|
`" + ${RuntimeGlobals.getFullHash}}().slice(0, ${length}) + "`,
|
|
module: {
|
|
id: '" + wasmModuleId + "',
|
|
hash: `" + wasmModuleHash + "`,
|
|
hashWithLength(length) {
|
|
return `" + wasmModuleHash.slice(0, ${length}) + "`;
|
|
}
|
|
},
|
|
runtime: chunk.runtime
|
|
}
|
|
);
|
|
|
|
const loader = this.generateLoadBinaryCode(wasmModuleSrcPath);
|
|
const fallback = [
|
|
`.then(${runtimeTemplate.returningFunction("x.arrayBuffer()", "x")})`,
|
|
`.then(${runtimeTemplate.returningFunction(
|
|
"WebAssembly.instantiate(bytes, importsObj)",
|
|
"bytes"
|
|
)})`,
|
|
`.then(${runtimeTemplate.returningFunction(
|
|
"Object.assign(exports, res.instance.exports)",
|
|
"res"
|
|
)})`
|
|
];
|
|
const getStreaming = () => {
|
|
const concat = (/** @type {string[]} */ ...text) => text.join("");
|
|
return [
|
|
`var req = ${loader};`,
|
|
`var fallback = ${runtimeTemplate.returningFunction(
|
|
Template.asString(["req", Template.indent(fallback)])
|
|
)};`,
|
|
concat(
|
|
"return req.then(",
|
|
runtimeTemplate.basicFunction("res", [
|
|
`if (typeof WebAssembly.instantiateStreaming === "function") {`,
|
|
Template.indent([
|
|
"return WebAssembly.instantiateStreaming(res, importsObj)",
|
|
Template.indent([
|
|
".then(",
|
|
Template.indent([
|
|
`${runtimeTemplate.returningFunction(
|
|
"Object.assign(exports, res.instance.exports)",
|
|
"res"
|
|
)},`,
|
|
runtimeTemplate.basicFunction("e", [
|
|
`if(res.headers.get("Content-Type") !== "application/wasm") {`,
|
|
Template.indent([
|
|
'console.warn("`WebAssembly.instantiateStreaming` failed because your server does not serve wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\\n", e);',
|
|
"return fallback();"
|
|
]),
|
|
"}",
|
|
"throw e;"
|
|
])
|
|
]),
|
|
");"
|
|
])
|
|
]),
|
|
"}",
|
|
"return fallback();"
|
|
]),
|
|
");"
|
|
)
|
|
];
|
|
};
|
|
|
|
return `${fn} = ${runtimeTemplate.basicFunction(
|
|
"exports, wasmModuleId, wasmModuleHash, importsObj",
|
|
this.supportsStreaming
|
|
? getStreaming()
|
|
: [`return ${loader}`, `${Template.indent(fallback)};`]
|
|
)};`;
|
|
}
|
|
}
|
|
|
|
module.exports = AsyncWasmLoadingRuntimeModule;
|